DR. JOANNE WILLIAMS M.D.
NPI 1508804881
Emergency Medicine in Van Nuys, CA
About Dr. Joanne Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOANNE WILLIAMS M.D. (NPI 1508804881) is an individual emergency medicine provider in Van Nuys, California, licensed in California (G51753) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1982).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 9
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Joanne Williams M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Joanne Williams reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90056
- Reassigned Medicare billing, California enrollment
- 204 clinicians in this Medicare group
Huntington Park, CA 90255
- Reassigned Medicare billing, California enrollment
- 74 clinicians in this Medicare group
Gardena, CA 90247
- Reassigned Medicare billing, California enrollment
- 57 clinicians in this Medicare group
Norwalk, CA 90650
- Reassigned Medicare billing, California enrollment
- 47 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91405 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
VAN NUYS, CA 91405
VAN NUYS, CA 91405
VAN NUYS, CA 91405
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Joanne Williams's NPI number?
The NPI number for Joanne Williams is 1508804881. It was assigned to this individual provider in the NPPES registry on June 2, 2006.
Where is Joanne Williams located?
Joanne Williams practices at 15107 Vanowen St, Van Nuys, CA 91405. The listed phone number is (818) 902-2990.
What is Joanne Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Joanne Williams enrolled in Medicare?
Yes. Joanne Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Joanne Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joanne Williams reassigns Medicare benefits to 5 organizations: Knd Development 59 LLC (Los Angeles, CA), Huntington Park Emergency Physicians, Inc (Huntington Park, CA), Redondo Emergency Physicians, Inc. (Gardena, CA), Coast Plaza Emergency Physicians Group Inc (Norwalk, CA) and Inpatient Specialists Of California, PC (San Bernardino, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Joanne Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Joanne Williams was last updated on August 31, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Joanne Williams, M.D. · NPI 1508804881
Emergency Medicine physician in Van Nuys, California. Individual provider, active in the CMS NPPES registry since June 2, 2006.
## Identity
- **NPI:** 1508804881 (Entity type: Individual)
- **Enumerated:** June 2, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** G51753 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 15107 VANOWEN ST, Van Nuys, CA 91405-4542
- **Phone:** (818) 902-2990 · **Fax:** (818) 904-3793
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Knd Development 59 LLC (NPI 1386973477, Los Angeles, CA); Huntington Park Emergency Physicians, Inc (NPI 1053747121, Huntington Park, CA); Redondo Emergency Physicians, Inc. (NPI 1376834937, Gardena, CA); Coast Plaza Emergency Physicians Group Inc (NPI 1912308446, Norwalk, CA); Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1982
## Record status
- **NPPES last updated:** August 31, 2009
- **Other identifiers:** Medicare UPIN A52073 (CA); Other 00G517530 (CA); Medicare OSCAR/certification WG51753R (CA); and 6 more
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Source: [NPI Profile](https://npiprofile.com/npi/1508804881) · Data from the CMS NPPES public registry.